President Barack Obama

Defying the Republican-run Congress, President Barack Obama rejected a bill Tuesday to approve construction of the Keystone XL oil pipeline, wielding his veto power for only the third time in his presidency.

President Barack Obama on Sunday encouraged parents to vaccinate their children and said the U.S. is doing everything in its power to rescue a 26-year-old woman held by the Islamic State, speaking in a wide-ranging interview also covering football and politics.